#693, Hide ToC aside menu if table of contents is empty

layouts/_default/baseof.html

@@ -33,7 +33,7 @@
       <label for="menu-control" class="hidden book-menu-overlay"></label>
     </div>
 
-    {{ if default true (default .Site.Params.BookToC .Params.BookToC) }}
+    {{ if partial "docs/toc-show" . }}
     <aside class="book-toc">
       <div class="book-toc-content">
         {{ template "toc" . }} <!-- Table of Contents -->

layouts/_partials/docs/header.html

@@ -6,7 +6,7 @@
   <h3>{{ partial "docs/title" . }}</h3>
 
   <label for="toc-control">
-    {{ if default true (default .Site.Params.BookToC .Params.BookToC) }}
+    {{ if partial "docs/toc-show" . }}
     <img src="{{ "svg/toc.svg" | relURL }}" class="book-icon" alt="Table of Contents" />
     {{ end }}
   </label>

layouts/_partials/docs/toc-show.html

@@ -0,0 +1,5 @@
+{{ return default true (
+  and
+    (default .Site.Params.BookToC .Params.BookToC)
+    (not (eq .TableOfContents "<nav id=\"TableOfContents\"></nav>"))
+) }}